--- loncom/lond	2012/10/05 15:19:18	1.497
+++ loncom/lond	2016/02/17 19:15:44	1.518
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.497 2012/10/05 15:19:18 raeburn Exp $
+# $Id: lond,v 1.518 2016/02/17 19:15:44 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -55,13 +55,16 @@ use LONCAPA::lonssl;
 use Fcntl qw(:flock);
 use Apache::lonnet;
 use Mail::Send;
+use Crypt::Eksblowfish::Bcrypt;
+use Digest::SHA;
+use Encode;
 
 my $DEBUG = 0;		       # Non zero to enable debug log entries.
 
 my $status='';
 my $lastlog='';
 
-my $VERSION='$Revision: 1.497 $'; #' stupid emacs
+my $VERSION='$Revision: 1.518 $'; #' stupid emacs
 my $remoteVERSION;
 my $currenthostid="default";
 my $currentdomainid;
@@ -130,32 +133,13 @@ my @passwderrors = ("ok",
 		   "pwchange_failure - lcpasswd Error filename is invalid");
 
 
-#  The array below are lcuseradd error strings.:
-
-my $lastadderror = 13;
-my @adderrors    = ("ok",
-		    "User ID mismatch, lcuseradd must run as user www",
-		    "lcuseradd Incorrect number of command line parameters must be 3",
-		    "lcuseradd Incorrect number of stdinput lines, must be 3",
-		    "lcuseradd Too many other simultaneous pwd changes in progress",
-		    "lcuseradd User does not exist",
-		    "lcuseradd Unable to make www member of users's group",
-		    "lcuseradd Unable to su to root",
-		    "lcuseradd Unable to set password",
-		    "lcuseradd Username has invalid characters",
-		    "lcuseradd Password has an invalid character",
-		    "lcuseradd User already exists",
-		    "lcuseradd Could not add user.",
-		    "lcuseradd Password mismatch");
-
-
 # This array are the errors from lcinstallfile:
 
 my @installerrors = ("ok",
 		     "Initial user id of client not that of www",
 		     "Usage error, not enough command line arguments",
-		     "Source file name does not exist",
-		     "Destination file name does not exist",
+		     "Source filename does not exist",
+		     "Destination filename does not exist",
 		     "Some file operation failed",
 		     "Invalid table filename."
 		     );
@@ -640,7 +624,7 @@ sub ConfigFileFromSelector {
 #     String to send to client ("ok" or "refused" if bad file).
 #
 sub PushFile {
-    my $request = shift;    
+    my $request = shift;
     my ($command, $filename, $contents) = split(":", $request, 3);
     &Debug("PushFile");
     
@@ -670,6 +654,44 @@ sub PushFile {
 
     if($filename eq "host") {
 	$contents = AdjustHostContents($contents);
+    } elsif ($filename eq 'dns_host' || $filename eq 'dns_domain') {
+        if ($contents eq '') {
+            &logthis('<font color="red"> Pushfile: unable to install '
+                    .$tablefile." - no data received from push. </font>");
+            return 'error: push had no data';
+        }
+        if (&Apache::lonnet::get_host_ip($clientname)) {
+            my $clienthost = &Apache::lonnet::hostname($clientname);
+            if ($managers{$clientip} eq $clientname) {
+                my $clientprotocol = $Apache::lonnet::protocol{$clientname};
+                $clientprotocol = 'http' if ($clientprotocol ne 'https');
+                my $url = '/adm/'.$filename;
+                $url =~ s{_}{/};
+                my $ua=new LWP::UserAgent;
+                $ua->timeout(60);
+                my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
+                my $response=$ua->request($request);
+                if ($response->is_error()) {
+                    &logthis('<font color="red"> Pushfile: unable to install '
+                            .$tablefile." - error attempting to pull data. </font>");
+                    return 'error: pull failed';
+                } else {
+                    my $result = $response->content;
+                    chomp($result);
+                    unless ($result eq $contents) {
+                        &logthis('<font color="red"> Pushfile: unable to install '
+                                .$tablefile." - pushed data and pulled data differ. </font>");
+                        my $pushleng = length($contents);
+                        my $pullleng = length($result);
+                        if ($pushleng != $pullleng) {
+                            return "error: $pushleng vs $pullleng bytes";
+                        } else {
+                            return "error: mismatch push and pull";
+                        }
+                    }
+                }
+            }
+        }
     }
 
     #  Install the new file:
@@ -1704,8 +1726,14 @@ sub read_lonnet_global {
 sub server_devalidatecache_handler {
     my ($cmd,$tail,$client) = @_;
     my $userinput = "$cmd:$tail";
-    my ($name,$id) = map { &unescape($_); } split(/:/,$tail);
-    &Apache::lonnet::devalidate_cache_new($name,$id);
+    my $items = &unescape($tail);
+    my @cached = split(/\&/,$items);
+    foreach my $key (@cached) {
+        if ($key =~ /:/) {
+            my ($name,$id) = map { &unescape($_); } split(/:/,$key);
+            &Apache::lonnet::devalidate_cache_new($name,$id);
+        }
+    }
     my $result = 'ok';
     &Reply($client,\$result,$userinput);
     return 1;
@@ -1988,15 +2016,14 @@ sub change_password_handler {
 	my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
 	if ($howpwd eq 'internal') {
 	    &Debug("internal auth");
-	    my $salt=time;
-	    $salt=substr($salt,6,2);
-	    my $ncpass=crypt($npass,$salt);
+            my $ncpass = &hash_passwd($udom,$npass);
 	    if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
 		my $msg="Result of password change for $uname: pwchange_success";
                 if ($lonhost) {
                     $msg .= " - request originated from: $lonhost";
                 }
                 &logthis($msg);
+                &update_passwd_history($uname,$udom,$howpwd,$context);
 		&Reply($client, "ok\n", $userinput);
 	    } else {
 		&logthis("Unable to open $uname passwd "               
@@ -2005,6 +2032,9 @@ sub change_password_handler {
 	    }
 	} elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') {
 	    my $result = &change_unix_password($uname, $npass);
+            if ($result eq 'ok') {
+                &update_passwd_history($uname,$udom,$howpwd,$context);
+             }
 	    &logthis("Result of password change for $uname: ".
 		     $result);
 	    &Reply($client, \$result, $userinput);
@@ -2027,6 +2057,42 @@ sub change_password_handler {
 }
 &register_handler("passwd", \&change_password_handler, 1, 1, 0);
 
+sub hash_passwd {
+    my ($domain,$plainpass,@rest) = @_;
+    my ($salt,$cost);
+    if (@rest) {
+        $cost = $rest[0];
+        # salt is first 22 characters, base-64 encoded by bcrypt
+        my $plainsalt = substr($rest[1],0,22);
+        $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt);
+    } else {
+        my $defaultcost;
+        my %domconfig =
+            &Apache::lonnet::get_dom('configuration',['password'],$domain);
+        if (ref($domconfig{'password'}) eq 'HASH') {
+            $defaultcost = $domconfig{'password'}{'cost'};
+        }
+        if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+            $cost = 10;
+        } else {
+            $cost = $defaultcost;
+        }
+        # Generate random 16-octet base64 salt
+        $salt = "";
+        $salt .= pack("C", int rand(256)) for 1..16;
+    }
+    my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({
+        key_nul => 1,
+        cost    => $cost,
+        salt    => $salt,
+    }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass)));
+
+    my $result = join("!", "", "bcrypt", sprintf("%02d",$cost),
+                &Crypt::Eksblowfish::Bcrypt::en_base64($salt).
+                &Crypt::Eksblowfish::Bcrypt::en_base64($hash));
+    return $result;
+}
+
 #
 #   Create a new user.  User in this case means a lon-capa user.
 #   The user must either already exist in some authentication realm
@@ -2070,7 +2136,8 @@ sub add_user_handler {
 		    ."makeuser";
 	    }
 	    unless ($fperror) {
-		my $result=&make_passwd_file($uname,$udom,$umode,$npass, $passfilename);
+		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                             $passfilename,'makeuser');
 		&Reply($client,\$result, $userinput);     #BUGBUG - could be fail
 	    } else {
 		&Failure($client, \$fperror, $userinput);
@@ -2131,36 +2198,30 @@ sub change_authentication_handler {
 	my $passfilename = &password_path($udom, $uname);
 	if ($passfilename) {	# Not allowed to create a new user!!
 	    # If just changing the unix passwd. need to arrange to run
-	    # passwd since otherwise make_passwd_file will run
-	    # lcuseradd which fails if an account already exists
-	    # (to prevent an unscrupulous LONCAPA admin from stealing
-	    # an existing account by overwriting it as a LonCAPA account).
+	    # passwd since otherwise make_passwd_file will fail as 
+	    # creation of unix authenticated users is no longer supported
+            # except from the command line, when running make_domain_coordinator.pl
 
 	    if(($oldauth =~/^unix/) && ($umode eq "unix")) {
 		my $result = &change_unix_password($uname, $npass);
 		&logthis("Result of password change for $uname: ".$result);
 		if ($result eq "ok") {
+                    &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 
 		    &Reply($client, \$result);
 		} else {
 		    &Failure($client, \$result);
 		}
 	    } else {
-		my $result=&make_passwd_file($uname,$udom,$umode,$npass,$passfilename);
+		my $result=&make_passwd_file($uname,$udom,$umode,$npass,
+                                             $passfilename,'changeuserauth');
 		#
 		#  If the current auth mode is internal, and the old auth mode was
 		#  unix, or krb*,  and the user is an author for this domain,
 		#  re-run manage_permissions for that role in order to be able
 		#  to take ownership of the construction space back to www:www
 		#
-		
-		
-		if( (($oldauth =~ /^unix/) && ($umode eq "internal")) ||
-		    (($oldauth =~ /^internal/) && ($umode eq "unix")) ) { 
-		    if(&is_author($udom, $uname)) {
-			&Debug(" Need to manage author permissions...");
-			&manage_permissions("/$udom/_au", $udom, $uname, "$umode:");
-		    }
-		}
+
+
 		&Reply($client, \$result, $userinput);
 	    }
 	       
@@ -2173,6 +2234,17 @@ sub change_authentication_handler {
 }
 &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0);
 
+sub update_passwd_history {
+    my ($uname,$udom,$umode,$context) = @_;
+    my $proname=&propath($udom,$uname);
+    my $now = time;
+    if (open(my $fh,">>$proname/passwd.log")) {
+        print $fh "$now:$umode:$context\n";
+        close($fh);
+    }
+    return;
+}
+
 #
 #   Determines if this is the home server for a user.  The home server
 #   for a user will have his/her lon-capa passwd file.  Therefore all we need
@@ -2791,8 +2863,12 @@ sub newput_user_profile_entry {
     foreach my $pair (@pairs) {
 	my ($key,$value)=split(/=/,$pair);
 	if (exists($hashref->{$key})) {
-	    &Failure($client, "key_exists: ".$key."\n",$userinput);
-	    return 1;
+            if (!&untie_user_hash($hashref)) {
+                &logthis("error: ".($!+0)." untie (GDBM) failed ".
+                         "while attempting newput - early out as key exists");
+            }
+            &Failure($client, "key_exists: ".$key."\n",$userinput);
+            return 1;
 	}
     }
 
@@ -3305,6 +3381,9 @@ sub dump_with_regexp {
 #                          namespace   - Name of the database being modified
 #                          rid         - Resource keyword to modify.
 #                          what        - new value associated with rid.
+#                          laststore   - (optional) version=timestamp
+#                                        for most recent transaction for rid
+#                                        in namespace, when cstore was called
 #
 #    $client             - Socket open on the client.
 #
@@ -3313,23 +3392,45 @@ sub dump_with_regexp {
 #      1 (keep on processing).
 #  Side-Effects:
 #    Writes to the client
+#    Successful storage will cause either 'ok', or, if $laststore was included
+#    in the tail of the request, and the version number for the last transaction
+#    is larger than the version in $laststore, delay:$numtrans , where $numtrans
+#    is the number of store evevnts recorded for rid in namespace since
+#    lonnet::store() was called by the client.
+#
 sub store_handler {
     my ($cmd, $tail, $client) = @_;
  
     my $userinput = "$cmd:$tail";
-
-    my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail);
+    chomp($tail);
+    my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
     if ($namespace ne 'roles') {
 
-	chomp($what);
 	my @pairs=split(/\&/,$what);
 	my $hashref  = &tie_user_hash($udom, $uname, $namespace,
 				       &GDBM_WRCREAT(), "S",
 				       "$rid:$what");
 	if ($hashref) {
 	    my $now = time;
-	    my @previouskeys=split(/&/,$hashref->{"keys:$rid"});
-	    my $key;
+            my $numtrans;
+            if ($laststore) {
+                my ($previousversion,$previoustime) = split(/\=/,$laststore);
+                my ($lastversion,$lasttime) = (0,0);
+                $lastversion = $hashref->{"version:$rid"};
+                if ($lastversion) {
+                    $lasttime = $hashref->{"$lastversion:$rid:timestamp"};
+                }
+                if (($previousversion) && ($previousversion !~ /\D/)) {
+                    if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) {
+                        $numtrans = $lastversion - $previousversion;
+                    }
+                } elsif ($lastversion) {
+                    $numtrans = $lastversion;
+                }
+                if ($numtrans) {
+                    $numtrans =~ s/D//g;
+                }
+            }
 	    $hashref->{"version:$rid"}++;
 	    my $version=$hashref->{"version:$rid"};
 	    my $allkeys=''; 
@@ -3342,7 +3443,11 @@ sub store_handler {
 	    $allkeys.='timestamp';
 	    $hashref->{"$version:keys:$rid"}=$allkeys;
 	    if (&untie_user_hash($hashref)) {
-		&Reply($client, "ok\n", $userinput);
+                my $msg = 'ok';
+                if ($numtrans) {
+                    $msg = 'delay:'.$numtrans;
+                }
+		&Reply($client, "$msg\n", $userinput);
 	    } else {
 		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
 			"while attempting store\n", $userinput);
@@ -3858,7 +3963,9 @@ sub put_course_id_hash_handler {
 #                 creationcontext - include courses created in specified context 
 #
 #                 domcloner - flag to indicate if user can create CCs in course's domain.
-#                             If so, ability to clone course is automatic. 
+#                             If so, ability to clone course is automatic.
+#                 hasuniquecode - filter by courses for which a six character unique code has 
+#                                 been set.
 #
 #     $client  - The socket open on the client.
 # Returns:
@@ -3883,7 +3990,7 @@ sub dump_course_id_handler {
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
         $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden,
         $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter,
-        $creationcontext,$domcloner) =split(/:/,$tail);
+        $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail);
     my $now = time;
     my ($cloneruname,$clonerudom,%cc_clone);
     if (defined($description)) {
@@ -3956,6 +4063,9 @@ sub dump_course_id_handler {
     } else {
         $creationcontext = '.';
     }
+    unless ($hasuniquecode) {
+        $hasuniquecode = '.';
+    }
     my $unpack = 1;
     if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 
         $typefilter eq '.') {
@@ -4044,6 +4154,9 @@ sub dump_course_id_handler {
                 $selfenroll_end = $items->{'selfenroll_end_date'};
                 $created = $items->{'created'};
                 $context = $items->{'context'};
+                if ($hasuniquecode ne '.') {
+                    next unless ($items->{'uniquecode'});
+                }
                 if ($selfenrollonly) {
                     next if (!$selfenroll_types);
                     if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) {
@@ -4319,6 +4432,122 @@ sub put_domain_handler {
 }
 &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
 
+# Updates one or more entries in clickers.db file at the domain level
+#
+# Parameters:
+#    $cmd      - The command that got us here.
+#    $tail     - Tail of the command (remaining parameters).
+#                In this case a colon separated list containing:
+#                (a) the domain for which we are updating the entries,
+#                (b) the action required -- add or del -- and
+#                (c) a &-separated list of entries to add or delete.
+#    $client   - File descriptor connected to client.
+# Returns
+#     1        - Continue processing.
+#     0        - Requested to exit, caller should shut down.
+#  Side effects:
+#     reply is written to $client.
+#
+
+
+sub update_clickers {
+    my ($cmd, $tail, $client)  = @_;
+
+    my $userinput = "$cmd:$tail";
+    my ($udom,$action,$what) =split(/:/,$tail,3);
+    chomp($what);
+
+    my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
+                                 "U","$action:$what");
+
+    if (!$hashref) {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                  "while attempting updateclickers\n", $userinput);
+        return 1;
+    }
+
+    my @pairs=split(/\&/,$what);
+    foreach my $pair (@pairs) {
+        my ($key,$value)=split(/=/,$pair);
+        if ($action eq 'add') {
+            if (exists($hashref->{$key})) {
+                my @newvals = split(/,/,&unescape($value));
+                my @currvals = split(/,/,&unescape($hashref->{$key}));
+                my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
+                $hashref->{$key}=&escape(join(',',@merged));
+            } else {
+                $hashref->{$key}=$value;
+            }
+        } elsif ($action eq 'del') {
+            if (exists($hashref->{$key})) {
+                my %current;
+                map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
+                map { delete($current{$_}); } split(/,/,&unescape($value));
+                if (keys(%current)) {
+                    $hashref->{$key}=&escape(join(',',sort(keys(%current))));
+                } else {
+                    delete($hashref->{$key});
+                }
+            }
+        }
+    }
+    if (&untie_user_hash($hashref)) {
+        &Reply( $client, "ok\n", $userinput);
+    } else {
+        &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
+                 "while attempting put\n",
+                 $userinput);
+    }
+    return 1;
+}
+&register_handler("updateclickers", \&update_clickers, 0, 1, 0);
+
+
+# Deletes one or more entries in a namespace db file at the domain level
+#
+# Parameters:
+#    $cmd      - The command that got us here.
+#    $tail     - Tail of the command (remaining parameters).
+#                In this case a colon separated list containing:
+#                (a) the domain for which we are deleting the entries,
+#                (b) &-separated list of keys to delete.  
+#    $client   - File descriptor connected to client.
+# Returns
+#     1        - Continue processing.
+#     0        - Requested to exit, caller should shut down.
+#  Side effects:
+#     reply is written to $client.
+#
+
+sub del_domain_handler {
+    my ($cmd,$tail,$client) = @_;
+
+    my $userinput = "$cmd:$tail";
+
+    my ($udom,$namespace,$what)=split(/:/,$tail,3);
+    chomp($what);
+    my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
+                                   "D", $what);
+    if ($hashref) {
+        my @keys=split(/\&/,$what);
+        foreach my $key (@keys) {
+            delete($hashref->{$key});
+        }
+        if (&untie_user_hash($hashref)) {
+            &Reply($client, "ok\n", $userinput);
+        } else {
+            &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
+                    "while attempting deldom\n", $userinput);
+        }
+    } else {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                 "while attempting deldom\n", $userinput);
+    }
+    return 1;
+}
+&register_handler("deldom", \&del_domain_handler, 0, 1, 0);
+
+
 # Unencrypted get from the namespace database file at the domain level.
 # This function retrieves a keyed item from a specific named database in the
 # domain directory.
@@ -4466,6 +4695,49 @@ sub get_id_handler {
 }
 &register_handler("idget", \&get_id_handler, 0, 1, 0);
 
+#   Deletes one or more ids in a domain's id database.
+#
+#   Parameters:
+#       $cmd                  - Command keyword (iddel).
+#       $tail                 - Command tail.  In this case a colon
+#                               separated list containing:
+#                               The domain for which we are deleting the id(s).
+#                               &-separated list of id(s) to delete.
+#       $client               - File open on client socket.
+# Returns:
+#     1   - Continue processing
+#     0   - Exit server.
+#     
+#
+
+sub del_id_handler {
+    my ($cmd,$tail,$client) = @_;
+
+    my $userinput = "$cmd:$tail";
+
+    my ($udom,$what)=split(/:/,$tail);
+    chomp($what);
+    my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(),
+                                   "D", $what);
+    if ($hashref) {
+        my @keys=split(/\&/,$what);
+        foreach my $key (@keys) {
+            delete($hashref->{$key});
+        }
+        if (&untie_user_hash($hashref)) {
+            &Reply($client, "ok\n", $userinput);
+        } else {
+            &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
+                    "while attempting iddel\n", $userinput);
+        }
+    } else {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                 "while attempting iddel\n", $userinput);
+    }
+    return 1;
+}
+&register_handler("iddel", \&del_id_handler, 0, 1, 0);
+
 #
 # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 
 #
@@ -5014,9 +5286,10 @@ sub validate_instcode_handler {
     my ($dom,$instcode,$owner) = split(/:/, $tail);
     $instcode = &unescape($instcode);
     $owner = &unescape($owner);
-    my ($outcome,$description) = 
+    my ($outcome,$description,$credits) = 
         &localenroll::validate_instcode($dom,$instcode,$owner);
-    my $result = &escape($outcome).'&'.&escape($description);
+    my $result = &escape($outcome).'&'.&escape($description).'&'.
+                 &escape($credits);
     &Reply($client, \$result, $userinput);
 
     return 1;
@@ -5232,7 +5505,7 @@ sub crsreq_checks_handler {
     my $userinput = "$cmd:$tail";
     my $dom = $tail;
     my $result;
-    my @reqtypes = ('official','unofficial','community');
+    my @reqtypes = ('official','unofficial','community','textbook');
     eval {
         local($SIG{__DIE__})='DEFAULT';
         my %validations;
@@ -5259,19 +5532,20 @@ sub crsreq_checks_handler {
 sub validate_crsreq_handler {
     my ($cmd, $tail, $client) = @_;
     my $userinput = "$cmd:$tail";
-    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail);
+    my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail);
     $instcode = &unescape($instcode);
     $owner = &unescape($owner);
     $crstype = &unescape($crstype);
     $inststatuslist = &unescape($inststatuslist);
     $instcode = &unescape($instcode);
     $instseclist = &unescape($instseclist);
+    my $custominfo = &Apache::lonnet::thaw_unescape($customdata);
     my $outcome;
     eval {
         local($SIG{__DIE__})='DEFAULT';
         $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype,
                                                  $inststatuslist,$instcode,
-                                                 $instseclist);
+                                                 $instseclist,$custominfo);
     };
     if (!$@) {
         &Reply($client, \$outcome, $userinput);
@@ -5282,6 +5556,53 @@ sub validate_crsreq_handler {
 }
 &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0);
 
+sub crsreq_update_handler {
+    my ($cmd, $tail, $client) = @_;
+    my $userinput = "$cmd:$tail";
+    my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code,
+        $accessstart,$accessend,$infohashref) =
+        split(/:/, $tail);
+    $crstype = &unescape($crstype);
+    $action = &unescape($action);
+    $ownername = &unescape($ownername);
+    $ownerdomain = &unescape($ownerdomain);
+    $fullname = &unescape($fullname);
+    $title = &unescape($title);
+    $code = &unescape($code);
+    $accessstart = &unescape($accessstart);
+    $accessend = &unescape($accessend);
+    my $incoming = &Apache::lonnet::thaw_unescape($infohashref);
+    my ($result,$outcome);
+    eval {
+        local($SIG{__DIE__})='DEFAULT';
+        my %rtnhash;
+        $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action,
+                                                $ownername,$ownerdomain,$fullname,
+                                                $title,$code,$accessstart,$accessend,
+                                                $incoming,\%rtnhash);
+        if ($outcome eq 'ok') {
+            my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript);
+            foreach my $key (keys(%rtnhash)) {
+                if (grep(/^\Q$key\E/,@posskeys)) {
+                    $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&';
+                }
+            }
+            $result =~ s/\&$//;
+        }
+    };
+    if (!$@) {
+        if ($outcome eq 'ok') {
+            &Reply($client, \$result, $userinput);
+        } else {
+            &Reply($client, "format_error\n", $userinput);
+        }
+    } else {
+        &Failure($client,"unknown_cmd\n",$userinput);
+    }
+    return 1;
+}
+&register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0);
+
 #
 #   Read and retrieve institutional code format (for support form).
 # Formal Parameters:
@@ -5989,18 +6310,6 @@ sub lcpasswdstrerror {
     }
 }
 
-#
-# Convert an error return code from lcuseradd to a string value:
-#
-sub lcuseraddstrerror {
-    my $ErrorCode = shift;
-    if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
-	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
-    } else {
-	return $adderrors[$ErrorCode];
-    }
-}
-
 # grabs exception and records it to log before exiting
 sub catchexception {
     my ($error)=@_;
@@ -6489,9 +6798,26 @@ sub make_new_child {
 #        my $tmpsnum=0;            # Now global
 #---------------------------------------------------- kerberos 5 initialization
         &Authen::Krb5::init_context();
-	unless (($dist eq 'fedora5') || ($dist eq 'fedora4') ||  
-		($dist eq 'fedora6') || ($dist eq 'suse9.3') ||
-                ($dist eq 'suse12.2')) {
+
+        my $no_ets;
+        if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
+            if ($1 >= 7) {
+                $no_ets = 1;
+            }
+        } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
+            if (($1 eq '9.3') || ($1 >= 12.2)) {
+                $no_ets = 1; 
+            }
+        } elsif ($dist =~ /^sles(\d+)$/) {
+            if ($1 > 11) {
+                $no_ets = 1;
+            }
+        } elsif ($dist =~ /^fedora(\d+)$/) {
+            if ($1 < 7) {
+                $no_ets = 1;
+            }
+        }
+        unless ($no_ets) {
 	    &Authen::Krb5::init_ets();
 	}
 
@@ -6536,7 +6862,6 @@ sub make_new_child {
 		#
 		#  If the remote is attempting a local init... give that a try:
 		#
-        logthis("remotereq: $remotereq");
 		(my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
         # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
         # version when initiating the connection. For LON-CAPA 2.8 and older,
@@ -6877,7 +7202,18 @@ sub validate_user {
     } 
     if ($howpwd ne 'nouser') {
 	if($howpwd eq "internal") { # Encrypted is in local password file.
-	    $validated = (crypt($password, $contentpwd) eq $contentpwd);
+            if (length($contentpwd) == 13) {
+                $validated = (crypt($password,$contentpwd) eq $contentpwd);
+                if ($validated) {
+                    my $ncpass = &hash_passwd($domain,$password);
+                    if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass")) {
+                        &update_passwd_history($user,$domain,$howpwd,'conversion');
+                        &logthis("Validated password hashed with bcrypt for $user:$domain");
+                    }
+                }
+            } else {
+                $validated = &check_internal_passwd($password,$contentpwd,$domain);
+            }
 	}
 	elsif ($howpwd eq "unix") { # User is a normal unix user.
 	    $contentpwd = (getpwnam($user))[1];
@@ -6945,6 +7281,39 @@ sub validate_user {
     return $validated;
 }
 
+sub check_internal_passwd {
+    my ($plainpass,$stored,$domain) = @_;
+    my (undef,$method,@rest) = split(/!/,$stored);
+    if ($method eq "bcrypt") {
+        my $result = &hash_passwd($domain,$plainpass,@rest);
+        if ($result ne $stored) {
+            return 0;
+        }
+        # Upgrade to a larger number of rounds if necessary
+        my $defaultcost;
+        my %domconfig =
+            &Apache::lonnet::get_dom('configuration',['password'],$domain);
+        if (ref($domconfig{'password'}) eq 'HASH') {
+            $defaultcost = $domconfig{'password'}{'cost'};
+        }
+        if (($defaultcost eq '') || ($defaultcost =~ /D/)) {
+            $defaultcost = 10;
+        }
+        return 1 unless($rest[0]<$defaultcost);
+    }
+    return 0;
+}
+
+sub get_last_authchg {
+    my ($domain,$user) = @_;
+    my $lastmod;
+    my $logname = &propath($domain,$user).'/passwd.log';
+    if (-e "$logname") {
+        $lastmod = (stat("$logname"))[9];
+    }
+    return $lastmod;
+}
+
 sub krb4_authen {
     my ($password,$null,$user,$contentpwd) = @_;
     my $validated = 0;
@@ -7260,26 +7629,26 @@ sub change_unix_password {
 
 
 sub make_passwd_file {
-    my ($uname,$udom,$umode,$npass,$passfilename)=@_;
+    my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_;
     my $result="ok";
     if ($umode eq 'krb4' or $umode eq 'krb5') {
 	{
 	    my $pf = IO::File->new(">$passfilename");
 	    if ($pf) {
 		print $pf "$umode:$npass\n";
+                &update_passwd_history($uname,$udom,$umode,$action);
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
 	}
     } elsif ($umode eq 'internal') {
-	my $salt=time;
-	$salt=substr($salt,6,2);
-	my $ncpass=crypt($npass,$salt);
+        my $ncpass = &hash_passwd($udom,$npass);
 	{
 	    &Debug("Creating internal auth");
 	    my $pf = IO::File->new(">$passfilename");
 	    if($pf) {
-		print $pf "internal:$ncpass\n"; 
+		print $pf "internal:$ncpass\n";
+                &update_passwd_history($uname,$udom,$umode,$action); 
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
@@ -7294,56 +7663,8 @@ sub make_passwd_file {
 	    }
 	}
     } elsif ($umode eq 'unix') {
-	{
-	    #
-	    #  Don't allow the creation of privileged accounts!!! that would
-	    #  be real bad!!!
-	    #
-	    my $uid = getpwnam($uname);
-	    if((defined $uid) && ($uid == 0)) {
-		&logthis(">>>Attempt to create privileged account blocked");
-		return "no_priv_account_error\n";
-	    }
-
-	    my $execpath       ="$perlvar{'lonDaemons'}/"."lcuseradd";
-
-	    my $lc_error_file  = $execdir."/tmp/lcuseradd".$$.".status";
-	    {
-		&Debug("Executing external: ".$execpath);
-		&Debug("user  = ".$uname.", Password =". $npass);
-		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
-		print $se "$uname\n";
-                print $se "$udom\n";
-		print $se "$npass\n";
-		print $se "$npass\n";
-		print $se "$lc_error_file\n"; # Status -> unique file.
-	    }
-	    if (-r $lc_error_file) {
-		&Debug("Opening error file: $lc_error_file");
-		my $error = IO::File->new("< $lc_error_file");
-		my $useraddok = <$error>;
-		$error->close;
-		unlink($lc_error_file);
-		
-		chomp $useraddok;
-	
-		if($useraddok > 0) {
-		    my $error_text = &lcuseraddstrerror($useraddok);
-		    &logthis("Failed lcuseradd: $error_text");
-		    $result = "lcuseradd_failed:$error_text";
-		}  else {
-		    my $pf = IO::File->new(">$passfilename");
-		    if($pf) {
-			print $pf "unix:\n";
-		    } else {
-			$result = "pass_file_failed_error";
-		    }
-		}
-	    }  else {
-		&Debug("Could not locate lcuseradd error: $lc_error_file");
-		$result="bug_lcuseradd_no_output_file";
-	    }
-	}
+	&logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users.");
+	$result="no_new_unix_accounts";
     } elsif ($umode eq 'none') {
 	{
 	    my $pf = IO::File->new("> $passfilename");
@@ -7593,7 +7914,7 @@ Allow for a password to be set.
 
 Make a user.
 
-=item passwd
+=item changeuserauth
 
 Allow for authentication mechanism and password to be changed.
 
@@ -7682,6 +8003,10 @@ for each student, defined perhaps by the
 Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
 for each student, defined perhaps by the institutional Registrar.)
 
+=item iddel
+
+Deletes one or more ids in a domain's id database.
+
 =item tmpput
 
 Accept and store information in temporary space.